Opera is listed among the browsers, ranked in random order, that new editions of Windows must offer first-time installers as of March 1, after a long and drawn-out legal battle over monopoly powers in Europe. Opera's team, in the meantime, has been fixing bugs and tweaking features—like HTML5-compliant video—like a team possessed. For us in the U.S., it's just convenient to be able to try out what looks to be a near-final Opera 10.5 on our Windows system, and feel some of that notable speed boost. No Mac or Linux builds yet, but they're likely to arrive, well, at least by tomorrow.